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2.
Clin. transl. oncol. (Print) ; 23(10): 2099-2108, oct. 2021. graf
Artigo em Inglês | IBECS | ID: ibc-223380

RESUMO

Purpose We aimed to evaluate the current situation of electronic health records (EHRs) and patient registries in the oncology departments of hospitals in Spain. Methods This was a cross-sectional study conducted from December 2018 to September 2019. The survey was designed ad hoc by the Outcomes Evaluation and Clinical Practice Section of the Spanish Society of Medical Oncology (SEOM) and was distributed to all head of medical oncology department members of SEOM. Results We invited 148 heads of oncology departments, and 81 (54.7%) questionnaires were completed, with representation from all 17 Spanish autonomous communities. Seventy-seven (95%) of the respondents had EHRs implemented at their hospitals; of them, over 80% considered EHRs to have a positive impact on work organization and clinical practice, and 73% considered that EHRs improve the quality of patient care. In contrast, 27 (35.1%) of these respondents felt that EHRs worsened the physician–patient relationship and conveyed an additional workload (n = 29; 37.6%). Several drawbacks in the implementation of EHRs were identified, including the limited inclusion of information on both outpatients and inpatients, information recorded in free text data fields, and the availability of specific informed consent. Forty-six (56.7%) respondents had patient registries where they recorded information from all patients seen in the department. Conclusion Our study indicates that EHRs are almost universally implemented in the hospitals surveyed and are considered to have a positive impact on work organization and clinical practice. However, EHRs currently have several drawbacks that limit their use for investigational purposes (AU)


Assuntos
Humanos , Serviço Hospitalar de Oncologia/estatística & dados numéricos , Registros Eletrônicos de Saúde , Oncologia/estatística & dados numéricos , Atitude do Pessoal de Saúde , Prescrição Eletrônica , Relações Médico-Paciente , Qualidade da Assistência à Saúde , Estudos Transversais , Inquéritos e Questionários , Espanha
3.
Clin Transl Oncol ; 23(10): 2099-2108, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33864619

RESUMO

PURPOSE: We aimed to evaluate the current situation of electronic health records (EHRs) and patient registries in the oncology departments of hospitals in Spain. METHODS: This was a cross-sectional study conducted from December 2018 to September 2019. The survey was designed ad hoc by the Outcomes Evaluation and Clinical Practice Section of the Spanish Society of Medical Oncology (SEOM) and was distributed to all head of medical oncology department members of SEOM. RESULTS: We invited 148 heads of oncology departments, and 81 (54.7%) questionnaires were completed, with representation from all 17 Spanish autonomous communities. Seventy-seven (95%) of the respondents had EHRs implemented at their hospitals; of them, over 80% considered EHRs to have a positive impact on work organization and clinical practice, and 73% considered that EHRs improve the quality of patient care. In contrast, 27 (35.1%) of these respondents felt that EHRs worsened the physician-patient relationship and conveyed an additional workload (n = 29; 37.6%). Several drawbacks in the implementation of EHRs were identified, including the limited inclusion of information on both outpatients and inpatients, information recorded in free text data fields, and the availability of specific informed consent. Forty-six (56.7%) respondents had patient registries where they recorded information from all patients seen in the department. CONCLUSION: Our study indicates that EHRs are almost universally implemented in the hospitals surveyed and are considered to have a positive impact on work organization and clinical practice. However, EHRs currently have several drawbacks that limit their use for investigational purposes. CLINICAL TRIAL REGISTRATION: Not applicable.


Assuntos
Registros Eletrônicos de Saúde/estatística & dados numéricos , Oncologia/estatística & dados numéricos , Serviço Hospitalar de Oncologia/estatística & dados numéricos , Sistema de Registros/estatística & dados numéricos , Atitude do Pessoal de Saúde , Estudos Transversais , Prescrição Eletrônica/estatística & dados numéricos , Humanos , Relações Médico-Paciente , Qualidade da Assistência à Saúde , Espanha , Inquéritos e Questionários/estatística & dados numéricos , Carga de Trabalho
4.
Clin Transl Oncol ; 22(8): 1364-1377, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32052382

RESUMO

PURPOSE: Hormone receptor (HR)-positive, Human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer (MBC) requires a therapeutic approach that takes into account multiple factors, with treatment being based on anti-estrogen hormone therapy (HT). As consensus documents are valuable tools that assist in the decision-making process for establishing clinical strategies and optimize the delivery of health services, this consensus document has been created with the aim of developing recommendations on cretiera for hormone sensitivity and resistance in HER2-negative luminal MBC and facilitating clinical decision-making. METHODS: This consensus document was generated using a modification of the RAND/UCLA methodology, which included the definition of the project and identification of issues of interest, a non-exhaustive systematic review of the literature, an analysis and synthesis of the scientific evidence, preparation of recommendations, and external evaluation with a panel of 64 medical oncologists specializing in breast cancer. RESULTS: A Spanish panel of experts reached consensus on 32 of the 32 recommendations/conclusions presented in the first round and were accepted with an approval rate of 100% about definition of metastatic disease not susceptible to local curative treatment, definition of hormone sensitivity and hormone resistance in metastatic luminal disease and therapeutic decision-making. CONCLUSION: We have developed a consensus document with recommendations on the treatment of patients with HER2-negative luminal MBC that will help to improve therapeutic benefits.


Assuntos
Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Tomada de Decisão Clínica , Consenso , Receptor ErbB-2 , Idoso , Biomarcadores Tumorais/sangue , Biópsia , Mama/patologia , Neoplasias da Mama/genética , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Resistencia a Medicamentos Antineoplásicos , Feminino , Expressão Gênica , Humanos , Imuno-Histoquímica , Antígeno Ki-67/análise , Menopausa/metabolismo , Pessoa de Meia-Idade , Terapia de Alvo Molecular , Recidiva Local de Neoplasia/metabolismo , Neoplasias Hormônio-Dependentes/diagnóstico , Ovário/efeitos dos fármacos , Guias de Prática Clínica como Assunto , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo
5.
Br J Cancer ; 111(8): 1532-41, 2014 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-25101563

RESUMO

BACKGROUND: In this study, we evaluated the ability of gene expression profiles to predict chemotherapy response and survival in triple-negative breast cancer (TNBC). METHODS: Gene expression and clinical-pathological data were evaluated in five independent cohorts, including three randomised clinical trials for a total of 1055 patients with TNBC, basal-like disease (BLBC) or both. Previously defined intrinsic molecular subtype and a proliferation signature were determined and tested. Each signature was tested using multivariable logistic regression models (for pCR (pathological complete response)) and Cox models (for survival). Within TNBC, interactions between each signature and the basal-like subtype (vs other subtypes) for predicting either pCR or survival were investigated. RESULTS: Within TNBC, all intrinsic subtypes were identified but BLBC predominated (55-81%). Significant associations between genomic signatures and response and survival after chemotherapy were only identified within BLBC and not within TNBC as a whole. In particular, high expression of a previously identified proliferation signature, or low expression of the luminal A signature, was found independently associated with pCR and improved survival following chemotherapy across different cohorts. Significant interaction tests were only obtained between each signature and the BLBC subtype for prediction of chemotherapy response or survival. CONCLUSIONS: The proliferation signature predicts response and improved survival after chemotherapy, but only within BLBC. This highlights the clinical implications of TNBC heterogeneity, and suggests that future clinical trials focused on this phenotypic subtype should consider stratifying patients as having BLBC or not.


Assuntos
Antineoplásicos/uso terapêutico , Análise de Sobrevida , Neoplasias de Mama Triplo Negativas/tratamento farmacológico , Estudos de Coortes , Feminino , Humanos , Pessoa de Meia-Idade , Resultado do Tratamento , Neoplasias de Mama Triplo Negativas/fisiopatologia
6.
Int J Med Inform ; 82(5): 398-407, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-22981645

RESUMO

PURPOSES: This paper presents the experience on the design and implementation of a user-centered Oncology Information System developed for the Medical Oncology Department at the "Hospital Universitario Virgen de la Victoria", in Málaga, Spain. The project focused on the aspects considered in the literature as critical factors for a successful deployment and usage of a health information system. METHODS: System usability, adequate technology, integration of clinical routines, real-time statistical analysis of data, information confidentiality and standard protocol-based external interconnection were the key aspects considered. RESULTS: The developed system is based on a web application with a modular and layered architecture accounting for usability, ease of maintenance and further system development. Evaluation of system usability was carried at three and fifteen months after system deployment to analyze the advantages/disadvantages experienced by the end-users. CONCLUSIONS: A thorough prior analysis of clinical activities and workflows, the use of the adequate technology, and the availability of data analysis tools will almost guarantee success in the deployment of an Oncology Information System.


Assuntos
Gestão da Informação em Saúde/organização & administração , Sistemas de Informação em Saúde/organização & administração , Sistemas de Informação em Saúde/estatística & dados numéricos , Oncologia , Sistemas Computadorizados de Registros Médicos , Humanos , Garantia da Qualidade dos Cuidados de Saúde , Interface Usuário-Computador
7.
Breast Cancer Res Treat ; 136(2): 487-93, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23053638

RESUMO

Chemotherapy remains as the only systemic treatment option available for basal-like breast cancer (BC) patients. Preclinical models and several phase II studies suggested that platinum salts are active drugs in this BC subtype though there is no randomized study supporting this hypothesis. This study investigates if the addition of carboplatin to a combination of an alkylating agent together with anthracyclines and taxanes is able to increase the efficacy in the neoadjuvant treatment context. Patients with operable breast cancer and immunophenotypically defined basal-like disease (ER-/PR-/HER2- and cytokeratin 5/6+ or EGFR+) were recruited. Patients were randomized to receive EC (epirubicin 90 mg/m(2) plus cyclophosphamide 600 mg/m(2) for 4 cycles) followed either by D (docetaxel 100 mg/m(2) × 4 cycles; EC-D) or DCb (docetaxel 75 mg/m(2) plus carboplatin AUC 6 × 4 cycles; EC-DCb). The primary end point was pathological complete response (pCR) in the breast following the Miller and Payne criteria. Ninety-four patients were randomized (46 EC-D, 48 EC-DCb). pCR rate in the breast was seen in 16 patients (35 %) with EC-D and 14 patients (30 %) with EC-DCb (P value = 0.61). pCR in the breast and axilla was seen in 30 % of patients in both arms. The overall clinical response rate was 70 % (95 % CI 56-83) in the EC-D arm and 77 % (95 % CI 65-87) in the EC-DCb arm. Grade 3/4 toxicity was similar in both arms. The addition of carboplatin to conventional chemotherapy with EC-D in basal-like breast cancer patients did not improve the efficacy probably because they had already received an alkylating agent. These findings should be taken into consideration when developing new agents for this disease.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Carboplatina/uso terapêutico , Terapia Neoadjuvante , Neoplasia de Células Basais/tratamento farmacológico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Neoplasias da Mama/patologia , Carboplatina/administração & dosagem , Carboplatina/efeitos adversos , Feminino , Humanos , Pessoa de Meia-Idade , Gradação de Tumores , Estadiamento de Neoplasias , Resultado do Tratamento
8.
Clin. transl. oncol. (Print) ; 14(2): 94-101, feb. 2012. tab
Artigo em Inglês | IBECS | ID: ibc-126107

RESUMO

The adverse effects associated to traditional chemotherapy are well known and broadly studied. In the recent years several tyrosine kinase inhibitors have been approved for cancer treatment and numerous are under investigation. These drugs target specific mutated/overexpressed tyrosin kinase receptors and frecuently their pharmacokinetic/pharmacodinamic behavior is not fully elucidated. These new drugs may interact with non-antineoplastic drugs leading to undesirable adverse effects. In this article, we will discuss different types of drug interactions and briefly review the pharmacokinetics and mechanisms of action of tyrosine kinase inhibitors in clinical use, with a particular emphasis on the risk of the occurrence of such interactions based on currently available scientific evidence (AU)


Assuntos
Humanos , Animais , Masculino , Feminino , Neoplasias/tratamento farmacológico , Neoplasias/enzimologia , Proteínas Tirosina Quinases/antagonistas & inibidores , /uso terapêutico , Interações Medicamentosas , Oncologia/métodos
9.
Clin. transl. oncol. (Print) ; 13(4): 281-286, abr. 2011. tab
Artigo em Inglês | IBECS | ID: ibc-124436

RESUMO

INTRODUCTION: To assess the efficacy and safety profile of biweekly vinorelbine and tegafur/uracil (UFT) as treatment in patients with metastatic breast cancer previously treated with anthracyclines and taxanes. PATIENTS AND METHODS: Patients with histologically confirmed breast cancer, measurable disease, no more than one prior chemotherapy regimen for metastatic disease, an Eastern Cooperative Oncology Group (ECOG) performance status ≤2, and adequate bone marrow, renal and liver function were eligible. Patients received vinorelbine (30 mg/m(2) on day 1) and UFT (250 mg/m(2) daily) every two weeks for 12 cycles unless progression or unacceptable toxicity was observed. RESULTS: Thirty-seven patients were included and received 311 cycles of chemotherapy. Efficacy and toxicity analyses were carried out on an intention-to-treat basis. The overall response rate was 35% (95% CI: 20-53). With a median follow-up of 18.6 months (95% CI: 1.0-74.3), the median time to progression was 7.0 months (96% CI: 5.2-8.9) and the median overall survival was 19.4 months (95% CI: 11.1-27.8). The most common severe toxicities were neutropenia (38% of patients) and asthenia (11% of patients). CONCLUSION: The combination of biweekly vinorelbine and UFT in patients with metastatic breast cancer pretreated with anthracyclines and taxanes is a well tolerated and effective regimen. AEMPS Trial Registration No.: 00-0534 (AU)


Assuntos
Humanos , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Ensaios Clínicos Fase II como Assunto , Estudos Multicêntricos como Assunto , Intervalo Livre de Doença , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Tegafur/uso terapêutico , Uracila/uso terapêutico , Vimblastina/análogos & derivados , Antraciclinas/uso terapêutico , Estimativa de Kaplan-Meier , Taxoides/uso terapêutico , Tegafur/administração & dosagem , Tegafur/efeitos adversos , Uracila/administração & dosagem , Uracila/efeitos adversos , Vimblastina/administração & dosagem , Vimblastina/efeitos adversos , Vimblastina/uso terapêutico
11.
Clin. transl. oncol. (Print) ; 12(9): 614-620, sept. 2010. tab
Artigo em Inglês | IBECS | ID: ibc-124306

RESUMO

Adjuvant endocrine therapy is the most important systemic treatment for postmenopausal women with hormone-receptor-positive early breast cancer following surgery. Most trials have shown that the third-generation aromatase inhibitors, anastrozole, letrozole (LET), and exemestane, significantly prolong disease-free survival compared with tamoxifen. However, an overall survival benefit with aromatase inhibitors was observed in only three trials to date, in retrospective analyses from selected groups of patients: sequential analysis in the Austrian Breast & Colorectal Study Group 8, switch analysis in the Intergroup Exemestane Study, and analysis of initial letrozole in Breast International Group 1-98 study. Although the priming effect observed in preclinical models and breast cancer patients provides a rationale for sequencing adjuvant endocrine treatment with tamoxifen and aromatase inhibitors, the optimal strategy for adjuvant endocrine treatment has yet to be determined. This review discusses aromatase inhibitor monotherapy, sequential adjuvant treatment with tamoxifen followed by an aromatase inhibitor, and sequential adjuvant treatment with an aromatase inhibitor followed by tamoxifen. Available data in support of and against each strategy is evaluated. The safety profiles of tamoxifen and aromatase inhibitors is also examined (AU)


Assuntos
Humanos , Feminino , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Antineoplásicos Hormonais/uso terapêutico , Inibidores da Aromatase/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Ensaios Clínicos como Assunto , Tamoxifeno/administração & dosagem , Tamoxifeno/uso terapêutico , Antineoplásicos Hormonais/administração & dosagem , Inibidores da Aromatase/administração & dosagem , Neoplasias da Mama/metabolismo , Neoplasias da Mama/mortalidade , Quimioterapia Adjuvante/métodos , Quimioterapia Adjuvante , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo
12.
Clin. transl. oncol. (Print) ; 12(1): 63-65, ene. 2010. ilus
Artigo em Inglês | IBECS | ID: ibc-123886

RESUMO

Fibromatosis is a rare, locally aggressive and bening breast tumor that presents problems in the diagnosis and may mimic breast cancer on physical examination, mammography and breast ultrasound. Definitive diagnosis is reached by histologic findings. This case shows the unusual presentation in our patient and management of this unfrecuent desmoid tumor (AU)


Assuntos
Humanos , Feminino , Adulto , Neoplasias da Mama/diagnóstico , Fibroma/diagnóstico , Fibromatose Agressiva/diagnóstico , Dor/diagnóstico , Neoplasias da Mama/complicações , Diagnóstico Diferencial , Fibroma/complicações
13.
Am J Clin Oncol ; 33(5): 432-7, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-19952716

RESUMO

PURPOSE: To evaluate the pathologic complete response (pCR) rate of a combination of epirubicin (E) and cyclophosphamide (C) followed by paclitaxel (P) and gemcitabine (G) (+ trastuzumab[T]) in Her2+ patients) in a sequential and dose-dense schedule as neoadjuvant chemotherapy for stages II and III patients with breast cancer. Secondary endpoints: clinical response rate, disease free survival, safety and correlation between pCR and biologic markers. PATIENTS AND METHODS: Eligible patients were treated with E (90 mg/m²) and C (600 mg/m²) for 3 cycles (first sequence) followed by P (150 mg/m²) and G (2500 mg/m²) (second sequence) for 6 cycles. All drugs were administered on day 1, every 2 weeks, with prophylactic growth factor support. Weekly T (2 mg/kg [4 mg/kg first infusion]) was administered concomitantly with P and G in Her2+ patients. A core biopsy was performed before treatment for biologic markers assessment. Patients underwent surgery, radiotherapy, and adjuvant hormonal therapy according to institutional practice. RESULTS: Seventy-three patients were treated. A pCR was achieved in 27 (37%) patients (32.1%, Her2- and 50%, Her2+). pCR was significantly higher in tumors that were hormonal receptor negative, poorly differentiated and positive for Ki67 and p53. Breast-conserving surgery was performed in 47 patients (64.4%). Most frequent grade 3/4 hematologic and nonhematological toxicities included neutropenia (12%), nausea/vomiting (17%), and transient liver enzymes elevation (7%). One patient suffered an asymptomatic and reversible decrease in left ventricular ejection fraction. CONCLUSIONS: These results show a highly effective regimen in terms of pCR with a good toxicity profile in the neoadjuvant treatment of patients with breast cancer. The addition of trastuzumab increased pCR rate in Her2+ tumors.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/patologia , Adulto , Idoso , Anticorpos Monoclonais/administração & dosagem , Anticorpos Monoclonais Humanizados , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Ciclofosfamida/administração & dosagem , Desoxicitidina/administração & dosagem , Desoxicitidina/análogos & derivados , Esquema de Medicação , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Epirubicina/administração & dosagem , Feminino , Humanos , Pessoa de Meia-Idade , Terapia Neoadjuvante , Estadiamento de Neoplasias , Paclitaxel/administração & dosagem , Receptor ErbB-2/metabolismo , Análise de Sobrevida , Trastuzumab , Gencitabina
14.
Clin. transl. oncol. (Print) ; 11(10): 643-650, oct. 2009.
Artigo em Inglês | IBECS | ID: ibc-123689

RESUMO

Breast cancer is a heterogeneous disease characterised by a dysregulation of multiple pathways related to cell differentiation, cell cycle control, apoptosis, angiogenesis and development of metastasis. Acting against these pathways provides therapeutic targets for new targeted biologic therapies, which, in the future, might constitute a key for fighting cancer. The development of molecular technology in recent years has allowed a further comprehension of these mutations and dysregulated pathways leading to oncogenesis. New targeted biologic therapies will block essential functions of cancer cells and tumour stroma. A growing number of therapy options, alone or in combination with background treatments (chemotherapy, hormone therapy, radiotherapy), will allow oncologists a better adaptation of treatment to patients and disease characteristics. Examples of approved targeted agents in breast cancer include agents targeting the human epidermal growth factor receptor 2 (HER2), such as trastuzumab, lapatinib and the anti-VEGF bevacizumab. In addition, there are other therapy classes under evaluation, including novel antiEGFR or antiHER2 therapies; agents fighting other tyrosine kinases, including the Src and the insulinlike growth factor receptor; agents interfering critically relevant pathways, such as PI3K/AKT/mTOR inhibitors; and agents promoting apoptosis, such as PARP inhibitors (for particular breast cancer subtypes, such as basal-like, or breast cancer with BRCA mutations) and others. The better selectivity against malignant cells of these therapies, when compared to conventional chemotherapy, gives, a priori, at least two advantages to biologic treatments: fewer side effects and a more individualised treatment of cancer depending on the tumour's molecular characteristics. The ability to identify patients' subgroups and response predicting factors will be crucial in obtaining the greatest benefit with minimal toxicity levels. Unsolved questions remain, such as appropriate patient selection based on the expression of the therapeutic target in the tumour, the study of the efficacy of the drug in not so extensively pretreated populations and with a greater chance of response, the use of new pharmacodynamic models to help to define new response predicting factors for a specific new biologic therapy, the combined and rational use of different biologic therapies having different molecular targets and fighting the same target through a complementary mechanism of action that might improve clinical efficacy (AU)


No disponible


Assuntos
Humanos , Feminino , Inibidores Enzimáticos/uso terapêutico , Antineoplásicos/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/metabolismo , Fosfatidilinositol 3-Quinases/antagonistas & inibidores , Proteínas Tirosina Quinases/antagonistas & inibidores , /antagonistas & inibidores , Receptores ErbB/antagonistas & inibidores
15.
Expert Rev Anticancer Ther ; 8(12): 1907-12, 2008 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19046111

RESUMO

Metastatic breast cancer (MBC) occurs in 20-30% of women with breast cancer and is an incurable disease. Treatment is palliative and directed to prolong survival, decrease symptoms and improve patients' quality of life. For patients with hormone receptor-negative disease or for hormone receptor-positive disease that has become resistant to endocrine therapy, or is progressing rapidly and life threatening, cytotoxic chemotherapy is indicated. However, the optimal duration of chemotherapy treatment for MBC is still a matter of debate. Studies using maintenance chemotherapy regimens standard in the 1990s showed a consistent benefit with a more prolonged time to progression, although an improvement in survival was only demonstrated in one study. Two recent trials with newer cytotoxic agents showed controversial results; whereas one study concluded that the policy of prolonging treatment in chemotherapy-sensitive patients, after aggressive, modern combination chemotherapy, cannot be recommended for women with MBC, the other study showed that maintenance therapy with pegylated liposomal doxorubicin significantly prolonged time to progression in MBC patients after first-line chemotherapy without significant clinical toxicity. Initial data regarding metronomic chemotherapy indicate that continuously low-dose cyclophosphamide and methotrexate is minimally toxic and effective in heavily pretreated breast cancer patients. In daily practice, maintenance chemotherapy is a reasonable strategy that prolongs time to progression in patients with MBC who did not show progression after first-line chemotherapy. However, this benefit should be considered together with toxicities of treatment and the patient's preference.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Neoplasias da Mama/patologia , Feminino , Humanos , Metástase Neoplásica
16.
Curr Drug Metab ; 9(4): 336-43, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18473752

RESUMO

Capecitabine is a drug that requires the consecutive action of three enzymes: carboxylesterase 2 (CES 2), cytidine deaminase (CDD), and thymidine phosphorylase (TP) for transformation into 5-fluorouracil (5FU). The metabolism of 5FU requires the activity of thymidylate synthase (TS) and dihydropyrimidine dehydrogenase (DPD) among other enzymes. The present study prospectively examined the possible relationship between the toxicity and efficacy of capecitabine and 14 different polymorphisms in CES 2, CDD, TS and DPD. Between 2003 and 2005, a total of 136 patients with advanced breast or colorectal cancer treated with capecitabine were prospectively enrolled. The presence of two polymorphisms (CDD 943insC and CES 2 Exon3 6046 G/A) were associated with a non-statistically significant higher incidence of grade 3 hand-foot syndrome (HFS) (p=0.07) and grade 3-4 diarrhoea (p=0.09), respectively. Patients heterozygous or homozygous for the polymorphism CES 2 5'UTR 823 C/G exhibited a significantly greater response rate to capecitabine, and time to progression of disease (59%, 8.7 months) than patients with the wild type gene sequence (32%, p=0.015; 5.3 months, p=0.014). For the first time, an association between a polymorphism in the CES2 gene and the efficacy of capecitabine has been described, providing preliminary evidence of its predictive and prognostic value.


Assuntos
Antimetabólitos Antineoplásicos/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Carboxilesterase/genética , Neoplasias Colorretais/tratamento farmacológico , Desoxicitidina/análogos & derivados , Fluoruracila/análogos & derivados , Neoplasias da Mama/patologia , Capecitabina , Neoplasias Colorretais/patologia , DNA de Neoplasias/genética , Desoxicitidina/uso terapêutico , Di-Hidrouracila Desidrogenase (NADP)/metabolismo , Progressão da Doença , Feminino , Fluoruracila/uso terapêutico , Genótipo , Humanos , Análise Multivariada , Projetos Piloto , Polimorfismo Genético/genética , Valor Preditivo dos Testes , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Timidilato Sintase/metabolismo
17.
Breast Cancer Res Treat ; 94(3): 265-72, 2005 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16254686

RESUMO

The objective of this study is to compare the predictive accuracy of a neural network (NN) model versus the standard Cox proportional hazard model. Data about the 3811 patients included in this study were collected within the 'El Alamo' Project, the largest dataset on breast cancer (BC) in Spain. The best prognostic model generated by the NN contains as covariates age, tumour size, lymph node status, tumour grade and type of treatment. These same variables were considered as having prognostic significance within the Cox model analysis. Nevertheless, the predictions made by the NN were statistically significant more accurate than those from the Cox model (p < 0.0001). Seven different time intervals were also analyzed to find that the NN predictions were much more accurate than those from the Cox model in particular in the early intervals between 1-10 and 11-20 months, and in the later one considered from 61 months to maximum follow-up time (MFT). Interestingly, these intervals contain regions of high relapse risk that have been observed in different studies and that are also present in the analyzed dataset.


Assuntos
Neoplasias da Mama/patologia , Redes Neurais de Computação , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Feminino , Previsões , Humanos , Metástase Linfática , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Modelos de Riscos Proporcionais , Medição de Risco
18.
Eur J Surg Oncol ; 30(3): 346-51, 2004 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-15028320

RESUMO

INTRODUCTION: Breast cancer is a disease with a very variable progression. Primary tumour size and metastatic lymph node involvement are the best indicators of the likelihood of relapse. However, their value in predicting progression following relapse is not clear. AIM: The aim of this study was to asses whether the relationship between tumour size and the number of lymph nodes involved had any value as predictive factors of post-relapse progression. METHOD: We established an index defined as the quotient between the number of diseased lymph nodes and the tumour size (in cm). RESULTS: Applying this index in 230 consecutive patients with metastatic breast cancer, we observed that there was a significant inverse relation between the index and post-relapse progression. CONCLUSION: We conclude that, at the time of initial diagnosis, the quotient of tumour size and the number of diseased lymph nodes could be a good predictor of time-to-progression following the diagnosis of the metastatic disease.


Assuntos
Neoplasias da Mama/patologia , Neoplasias da Mama/fisiopatologia , Adulto , Idoso , Neoplasias da Mama/mortalidade , Progressão da Doença , Feminino , Humanos , Metástase Linfática , Pessoa de Meia-Idade , Metástase Neoplásica , Estadiamento de Neoplasias , Valor Preditivo dos Testes , Análise de Sobrevida
19.
Breast Cancer Res Treat ; 77(1): 1-8, 2003 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-12602899

RESUMO

PURPOSE: To evaluate the efficacy and the toxicity profile of the sequential administration of doxorubicin and docetaxel as first-line chemotherapy in metastatic breast cancer (MBC). PATIENTS AND METHODS: Eighty-one patients received a total of 436 cycles of chemotherapy: 236 of doxorubicin (75 mg/m2) and 200 of docetaxel (100 mg/m2 every 21 days). The first 35 patients received doxorubicin every 14 days with G-CSF support, and in the other 46 cases doxorubicin was administered every 21 days without G-CSF. RESULTS: After entire treatment the overall response rate was 65% (18 complete responses). With a median follow-up of 19 months (range, 1-48 months), the median time to progression was 11.3 months and the median survival time was 31 months. As expected, febrile neutropenia was the most important toxicity and it appeared in 26 cycles (6%) and 19 patients (23%). In the patients that received doxorubicin every 14 days, the febrile neutropenia incidence was higher during docetaxel treatment, especially after its first administration. CONCLUSIONS: The dose and schedule of doxorubicin and docetaxel used in this trial seems to be active in first-line treatment of patients with MBC. The toxicity profile appears to be better than observed with concomitant schedules.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Doxorrubicina/administração & dosagem , Paclitaxel/análogos & derivados , Paclitaxel/administração & dosagem , Taxoides , Adulto , Idoso , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Docetaxel , Esquema de Medicação , Feminino , Fator Estimulador de Colônias de Granulócitos/administração & dosagem , Humanos , Infusões Intravenosas , Pessoa de Meia-Idade , Metástase Neoplásica , Cuidados Paliativos , Estudos Prospectivos , Espanha , Análise de Sobrevida , Resultado do Tratamento
20.
Leuk Lymphoma ; 41(3-4): 353-8, 2001 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-11378548

RESUMO

UNLABELLED: The purpose of this study was to determine the effect of granulocyte colony-stimulating factor (filgrastim, G-CSF) for maintenance of chemotherapy dose-intensity in patients with stage I or II Hodgkin's lymphoma treated with six cycles of doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD). Fifty-six patients with stage I or II Hodgkin's lymphoma treated with ABVD were eligible for secondary prophylactic G-CSF administration because of neutropenia (absolute neutrophil count < 1 x 10(9) /L) causing treatment delay or febrile neutropenia. Patients received 300 microg (total dose) of G-CSF (filgrastim) subcutaneously on days 3 to 7 and 17 to 21 of each cycle in order to prevent dose reduction or delay in subsequent cycles of treatment continuing the G-CSF until completion of chemotherapy. Results showed that 30 (54%) of the patients required the use of G-CSF, 26 (47%) during the first or second cycle. After G-CSF administration delay in chemotherapy did not occur in 25 patients, whereas delays in the fifth or sixth cycle occurred in four patients. Despite treatment with G-CSF, one patient had febrile neutropenia. Dose intensity greater than 90% of that planned was delivered to more the 85% of patients. IN CONCLUSION: Secondary prophylactic G-CSF administration was necessary in more than half of patients with stage I or II Hodgkin's lymphoma during chemotherapy with ABVD. The use of G-CSF allowed maintenance of chemotherapy schedule and dose intensity in the majority of patients.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Fator Estimulador de Colônias de Granulócitos/administração & dosagem , Doença de Hodgkin/tratamento farmacológico , Adolescente , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/toxicidade , Bleomicina/administração & dosagem , Bleomicina/toxicidade , Estudos de Coortes , Dacarbazina/administração & dosagem , Dacarbazina/toxicidade , Doxorrubicina/administração & dosagem , Doxorrubicina/toxicidade , Feminino , Filgrastim , Seguimentos , Fator Estimulador de Colônias de Granulócitos/toxicidade , Doença de Hodgkin/complicações , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Prospectivos , Proteínas Recombinantes , Resultado do Tratamento , Vimblastina/administração & dosagem , Vimblastina/toxicidade
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